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5 Channel Amp Isn't Powering My Sub

Discussion in 'Audio & Video' started by 455h0le_dachshund, Aug 24, 2025 at 11:19 PM.

  1. Aug 24, 2025 at 11:19 PM
    #1
    455h0le_dachshund

    #1
    455h0le_dachshund [OP] Death machine & man in love gogogogo

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    I'm only getting power to the speakers, but not the sub. It stopped working a few weeks ago and I adjusted the connections to the sub and it started working fine. Fast forward a few weeks and it stopped working again. I checked the wiring at the amp and the sub and the fuses. I'm at a loss here. Maybe something wrong with the amp?

    Any ideas, fellas?
     
    Last edited: Aug 24, 2025 at 11:24 PM
    455h0le_dachshund, Aug 24, 2025 at 11:19 PM
    #1
  2. Aug 25, 2025 at 5:35 AM
    #2
    BlackNBlu

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    BlackNBlu Justa Member

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    Not just in "protection" mode or similar? (Always the simple stuff first.)

    Since you had "adjusted connections" and had it working after: Possible all yer base is shaking an internal power connection loose at/in the amp?
    This assumes there is a separate internal path to sub amp power section.
     
    BlackNBlu, Aug 25, 2025 at 5:35 AM
    #2
  3. Aug 25, 2025 at 5:42 AM
    #3
    KNABORES

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    KNABORES Sarcasm incoming

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    If adjusting the connections helped, I would start by checking all of the connections and cables. Maybe a bad or cheap cable? If wiggling the cable at the amp (the speaker cable? Or the RCA input) makes it work, try replacing with a new cable. Of that doesn’t fix it, could be the actual terminal on the amp is loose, like a bad solder connection inside. My Punch amp does that now. I need to pull it and resolder the rcas.
     
    KNABORES, Aug 25, 2025 at 5:42 AM
    #3
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Alpine S-A55V S-Series Class D 5-Channel Amplifier
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